A safety ladder made special for attachment to a lubricator, or a vertically disposed pipe, which enables a person to safely scale the lubricator after it has been affixed to a well head. The improved safety ladder apparatus of this invention is externally attached to the lubricator in such a manner that a rigid triangular structure of great structural integrity results from the combination. The ladder forms the hypotenuse of the triangle and is attached at a comfortable downwardly sloped angle respective to the lubricator so that it is easy and safe to scale. The ladder has opposed side rails rigidly connected together by a plurality of spaced rungs, and an upper end opposed to a lower end. A seat or chair is attached to the upper end of the ladder and forms part of the ladder apparatus. There is an anchor device mounted at the top of the ladder that is in the form of a yoke.